Riddling apparatus for separating straw, cavings, chaff, and the like from grain or seeds.



H. S. RAINFORTH. RIDDLING APPARATUS FOR SEPARATING STRAW, GAVINGS, GHAFPAND THE LIKE PROM I GRAIN 0R SEEDS.

APPLICATION FILED OCT. 8, 1910.

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H. S. RAINPORTH. RIDDLING APPARATUS FOR SEPARATING STRAW, CAVINGS GRAIN0R sEEDs.

I APPLICATION FILED OCT. 8 1910. 1,026,529.

, CHAPF, AND THE LIKE FROM Patented May 14, 1912.

2 SHEETS-SHEET 2.

COLUMBIA PLANDGRAPH CO.,W1\SH1NGTON, 04 C.

UNITED STATES PATENT OFFICE.

HENRY SLACK RAINFORTH, 0F LINCOLN, ENGLAND.

RIDDLING- APPARATUS FOR SEPARATING STRAW, CAVINGS, CI-IAFF, AND THE LIKEFROM GRAIN 0R SEEDS.

Specification of Letters Patent.

Patented May 14, 1912.

Application filed October 8, 1910. Serial No. 586,016.

To all whom it may concern Be it known that I, HENRY SLACK RA'IN- FORTH,a subject of the King of Great Britain and Ireland, and a resident ofLincoln, England, have invented certain new and useful Improvements inRiddling Apparatus for Separating Straw, 'Cavings, Chaif, and the Likefrom Grain or Seeds; and I do hereby declare the following to be a full,clear, and exact description of the same.

This invention relates to improvements in and connected with sieves orscreens for use in threshing machines, for separating straw,

. cavings, chaff, and the like, fromgrain, and

seed.

The invention has for its object to obtain a more effective separation.

According to the present invention, the sieve is made with slats orsections, corrugated from back to front and formed with downturnedforward ends. At such ends, the slats or sections are formed with recesses which in adjacent slats or sections are arranged alternately orin staggered formation. The slats or sections may be stationarily orpivotally mounted in relation to the sieve frame, and in the latter casehave both their forward and their rearward ends downturned. By thesemeans a better separation of the straw from the grain is obtained, andwhen air blast is used a better distribution of the air-currents acrossthe width of the sieve is' effected. The slats or sections arepreferably placed on stepped frames which are suitably supported at aslight inclination and are given a long forward and backward movement intheir inclined direction, which produces a very effective separatingaction. Preferably a plurality of frames is mounted in the machine so asto overlap one another and they are moved simultaneously in oppositedirections to act more violently on the straw.

The invention is illustrated in the accompanying drawings, in whichFigure 1 represents a sectional elevation of sufficient of a threshingmachine to enable the application of the present invention to be readilyunderstood; Figs. 2 and 3 represent sectional and plan views of asievecomposed of corrugated slats or sections having their forward endsdownturned; Figs. 4 and 5 represent sectional and plan views of twopivotally mounted slats or sections having both their forward and theirrearward ends downturned.

Referring to the drawings, the sieves are formed of slats or sections,A, which are downturned at their forward ends, a The slats may beconnected together, as shown in Figs. 1 to 3, by being stamped fromsheet metal. Or, referring to Figs. 4 and 5, the slats may be mounted oncross rods, a pivotally supported at the sides of the sieve frames, andadapted to be partly rotated in any convenient manner to adjust the meshof the sieve. In this case, the slats have both their forward ends, aand their rearward ends, a downturned, and the furrows of the downturnedrearward parts lie in line with the ridges of the main parts of theslats.

a are apertures formed through the downturned forward ends or recessesformed in the downturned forward ends of the slats to form passages forthe grain, and for the air blast if used, to pass through. Theapertures, (L in adjacent slats are arranged alternately so as tobreak-joint with one "another so that a better separating action isobtained as aforesaid. The slats are made of a corrugated formation fromback to front, as shown in Figs. 3 and 5. The corrugations in adjacentslats are arranged alternately, so that the ridges of the corrugationsof one slat lie in line with the furrows of the corrugations of theadjacent slats. The downturned forward ends are preferably of a curvedformation as shown in Figs. 2 and 4, but may be straight as shown inFig. 1.

B, B represent the frames on which the slats are supported. These framesare formed with stepped sides, 6 each step supporting a series of slats,or sieve sections, so that the straw is subjected to a better separatingaction in passing over the sieve or shaker. The frames are arranged at aslight inclination, one in front of the other, and so that the inner endof one sieve overlaps the inner end of the other so as to form as itwere one continuous stepped sieve from end to end. The front frame, B,is pivotally connected at its fore end, by a pin, 6 to a link, C; andthe rear frame, B is pivotally connected at its rear end, by a pin, 6 toa link, D. The links, C, I), are pivotally supported by the machineframe, E, as at 0 and d respectively. The front frame, B, at its rearend is provided with a bracket, 6 which is pivotally connected at itsupper end, by a pin, F, to the upper arm, F, of a double link; and therear frame, B, at its front end, is pivotally connected by a pin, f tothe lower arm, F of the double link. The arms, F, F, of the double linkare mounted upon a short spindle, f, supported in a bearing, f arrangedbetween the arms, on the machine frame. The lower arm, F is pivotallyconnected as at f, to a connecting rod, Gr, connected to a crank pin, kon a fly wheel, H, arranged in advance of the rear frame, B The pins, 6f f pass through arc-like slots, 6 in the side of the machine frame, E,which accommodate their movement. By these means, when in operation theframes are reciprocated and caused to move in opposite directions at thesame time, which besides obtaining a better separating effect aids inbalancing the apparatus.

If desired, the arms, F, F, may be of a shorter radius than the links,C, D, as this construction gives a peculiarly effective combinedoscillating and reciprocating motion to the frames. The distance of thepins, f F, from the center, f may be made adjustable to enable the throwof the frames to be regulated, if desired.

Supporting and driving means as above described are arranged on eachside of the machine, and both fly wheels are mounted on one main drivingshaft, 7%, extending across the machine. The fly-wheel on one side isadapted to be driven by a band, I, from a pulley, J, on the drumspindle, j

L represents the top shoe or collecting tray for the grain and chaffpassing through the concave, M, of the drum, N, and through the shakersieves, A, from which the straw is ejected in the direction indicated bythe arrow 1.

0 represents the caving riddle, actuated in known manner, through whichthe grain and chaff pass and from which the cavings pass in thedirection indicated by the arrow, 2. 7

p 12 represent dressing sieves of differentrmesh and of large area, andarranged so that the blast from the blower, Q, acts on the chat]? andseed as it falls through the opening, 0 in the inclined bottom of thecaving riddle, and also acts by blowing through the upper sieve, 19 Thechaff is blown out in the direction indicated by the arrow, 3, over thewind-board, p and the grain passes in a. roughly cleaned condition intothe well of the corn elevator, B.

What I claim as my invention and desire to secure by Letters-Patentis 1. A sieve for use in a threshing machine comprising a plurality ofcorrugated screening members, the corrugations in adjacent members beingarranged alternately, so that the ridges of the corrugations of onemember lie in line with the furrows of the corrugat-ions of the adjacentmembers.

2. A sieve for use in a threshing machine comprising a plurality ofcorrugated screening members having their forward ends downturned, thecorrugations in adjacent members being arranged alternately.

3. A sieve'for use in a threshing machine comprising a plurality ofcorrugated screening members having their forward ends downturned andprovided at their forward ends with apertures arranged alternately inadjacent members, the corrugations in adjacent members also beingarranged alternately.

4. A sieve for use in a threshing machine comprising a plurality ofcorrugated screening members having their forward ends downturned andtheir rearward ends downturned, the furrows of the downturned rearwardparts lying in line with the ridges of the main parts of the members.

In testimony whereof I afiix my signature, in presence of twosubscribing witnesses.

HENRY SLACK RAINFORTH.

Witnesses:

WRIGHT HOLMES, CHARLES BLADES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

